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    <title>Document</title>
    <script>
        var num = 1;
        while (num <= 100) {
            console.log('易烊千玺');
            num ++;
        }
        //里面应该也有计数器，初始化变量
        //里面应该也有操作表达式，完成计数器的更新，防止死循环
    </script>
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</body>
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